Hi all,

I have a question about exp(j2*pi*n) signal . This signal is a impulse in

frequency domain. I could not get much intuition about this signal. but I

see this signal used in many applications related to radar. what is its

property like? What difference will it cause in transmission( in terms of

distance travelled, energy , power, reflections) when it is low frequency

and high frequency. Thank you so much. I got really good replies for my

previous question on this forum.. Thanks a lot to everyone

Regards,

Mahadevi.

# Low frequency - High frequency signal

Started by ●December 3, 2009

Posted by ●December 3, 2009

Mahadevi-

> I have a question about exp(j2*pi*n) signal . This signal is a impulse in

> frequency domain. I could not get much intuition about this signal. but I

> see this signal used in many applications related to radar. what is its

> property like? What difference will it cause in transmission( in terms of

> distance travelled, energy , power, reflections) when it is low frequency

> and high frequency. Thank you so much. I got really good replies for my

> previous question on this forum.. Thanks a lot to everyone

Your signal is a sine wave in the time domain -- there is huge amount of info online about sine waves that you can study.

But just a comment about intuition of this signal: I like to think of sinusoidal signals as efficient ways to

transmit something. RF signals, power lines, audio tones, light (to some extent), tsunamis -- all sine waves, and all

efficient ways to "move something" over distance.

-Jeff

> I have a question about exp(j2*pi*n) signal . This signal is a impulse in

> frequency domain. I could not get much intuition about this signal. but I

> see this signal used in many applications related to radar. what is its

> property like? What difference will it cause in transmission( in terms of

> distance travelled, energy , power, reflections) when it is low frequency

> and high frequency. Thank you so much. I got really good replies for my

> previous question on this forum.. Thanks a lot to everyone

Your signal is a sine wave in the time domain -- there is huge amount of info online about sine waves that you can study.

But just a comment about intuition of this signal: I like to think of sinusoidal signals as efficient ways to

transmit something. RF signals, power lines, audio tones, light (to some extent), tsunamis -- all sine waves, and all

efficient ways to "move something" over distance.

-Jeff

Posted by ●December 3, 2009

> I have a question about exp(j2*pi*n) signal . This
signal is a impulse in

> frequency domain. I could not get much intuition about this signal. but I

> see this signal used in many applications related to radar. what is its

> property like?

The exp( ) is an eigen value, that is the output of the channel has a direct

relation (in a SISO system its a multiple).

> What difference will it cause in transmission( in terms of

> distance travelled, energy , power, reflections) when it is low frequency

> and high frequency.

High frequency is preffered becuse of the less interference (ISI), I dont

know if it has something to do with distance traveled !

Mohammad

--

Mohammad Alawieh

Fraunhofer IIS

Power Efficient Systems Department

Navigation Group

Nordostpark 93

90411 Nnberg

Phone: +49 911 21 35 504

Mobile: +49 176 64 37 33 75

> frequency domain. I could not get much intuition about this signal. but I

> see this signal used in many applications related to radar. what is its

> property like?

The exp( ) is an eigen value, that is the output of the channel has a direct

relation (in a SISO system its a multiple).

> What difference will it cause in transmission( in terms of

> distance travelled, energy , power, reflections) when it is low frequency

> and high frequency.

High frequency is preffered becuse of the less interference (ISI), I dont

know if it has something to do with distance traveled !

Mohammad

--

Mohammad Alawieh

Fraunhofer IIS

Power Efficient Systems Department

Navigation Group

Nordostpark 93

90411 Nnberg

Phone: +49 911 21 35 504

Mobile: +49 176 64 37 33 75